Struct bit_set::BitSet

pub struct BitSet<B = u32> {
    // some fields omitted
}

Methods

impl BitSet<u32>

fn new() -> Self

Creates a new empty BitSet.

Examples

use bit_set::BitSet;

let mut s = BitSet::new();

fn with_capacity(nbits: usize) -> Self

Creates a new BitSet with initially no contents, able to hold nbits elements without resizing.

Examples

use bit_set::BitSet;

let mut s = BitSet::with_capacity(100);
assert!(s.capacity() >= 100);

fn from_bit_vec(bit_vec: BitVec) -> Self

Creates a new BitSet from the given bit vector.

Examples

extern crate bit_vec;
extern crate bit_set;

fn main() {
    use bit_vec::BitVec;
    use bit_set::BitSet;

    let bv = BitVec::from_bytes(&[0b01100000]);
    let s = BitSet::from_bit_vec(bv);

    // Print 1, 2 in arbitrary order
    for x in s.iter() {
        println!("{}", x);
    }
}

fn from_bytes(bytes: &[u8]) -> Self

impl<B: BitBlock> BitSet<B>

fn capacity(&self) -> usize

Returns the capacity in bits for this bit vector. Inserting any element less than this amount will not trigger a resizing.

Examples

use bit_set::BitSet;

let mut s = BitSet::with_capacity(100);
assert!(s.capacity() >= 100);

fn reserve_len(&mut self, len: usize)

Reserves capacity for the given BitSet to contain len distinct elements. In the case of BitSet this means reallocations will not occur as long as all inserted elements are less than len.

The collection may reserve more space to avoid frequent reallocations.

Examples

use bit_set::BitSet;

let mut s = BitSet::new();
s.reserve_len(10);
assert!(s.capacity() >= 10);

fn reserve_len_exact(&mut self, len: usize)

Reserves the minimum capacity for the given BitSet to contain len distinct elements. In the case of BitSet this means reallocations will not occur as long as all inserted elements are less than len.

Note that the allocator may give the collection more space than it requests. Therefore capacity can not be relied upon to be precisely minimal. Prefer reserve_len if future insertions are expected.

Examples

use bit_set::BitSet;

let mut s = BitSet::new();
s.reserve_len_exact(10);
assert!(s.capacity() >= 10);

fn into_bit_vec(self) -> BitVec<B>

Consumes this set to return the underlying bit vector.

Examples

use bit_set::BitSet;

let mut s = BitSet::new();
s.insert(0);
s.insert(3);

let bv = s.into_bit_vec();
assert!(bv[0]);
assert!(bv[3]);

fn get_ref(&self) -> &BitVec<B>

Returns a reference to the underlying bit vector.

Examples

use bit_set::BitSet;

let mut s = BitSet::new();
s.insert(0);

let bv = s.get_ref();
assert_eq!(bv[0], true);

fn shrink_to_fit(&mut self)

Truncates the underlying vector to the least length required.

Examples

use bit_set::BitSet;

let mut s = BitSet::new();
s.insert(32183231);
s.remove(32183231);

// Internal storage will probably be bigger than necessary
println!("old capacity: {}", s.capacity());

// Now should be smaller
s.shrink_to_fit();
println!("new capacity: {}", s.capacity());

fn iter(&self) -> Iter<B>

Iterator over each usize stored in the BitSet.

Examples

use bit_set::BitSet;

let s = BitSet::from_bytes(&[0b01001010]);

// Print 1, 4, 6 in arbitrary order
for x in s.iter() {
    println!("{}", x);
}

fn union<'a>(&'a self, other: &'a Self) -> Union<'a, B>

Iterator over each usize stored in self union other. See union_with for an efficient in-place version.

Examples

use bit_set::BitSet;

let a = BitSet::from_bytes(&[0b01101000]);
let b = BitSet::from_bytes(&[0b10100000]);

// Print 0, 1, 2, 4 in arbitrary order
for x in a.union(&b) {
    println!("{}", x);
}

fn intersection<'a>(&'a self, other: &'a Self) -> Intersection<'a, B>

Iterator over each usize stored in self intersect other. See intersect_with for an efficient in-place version.

Examples

use bit_set::BitSet;

let a = BitSet::from_bytes(&[0b01101000]);
let b = BitSet::from_bytes(&[0b10100000]);

// Print 2
for x in a.intersection(&b) {
    println!("{}", x);
}

fn difference<'a>(&'a self, other: &'a Self) -> Difference<'a, B>

Iterator over each usize stored in the self setminus other. See difference_with for an efficient in-place version.

Examples

use bit_set::BitSet;

let a = BitSet::from_bytes(&[0b01101000]);
let b = BitSet::from_bytes(&[0b10100000]);

// Print 1, 4 in arbitrary order
for x in a.difference(&b) {
    println!("{}", x);
}

// Note that difference is not symmetric,
// and `b - a` means something else.
// This prints 0
for x in b.difference(&a) {
    println!("{}", x);
}

fn symmetric_difference<'a>(&'a self, other: &'a Self) -> SymmetricDifference<'a, B>

Iterator over each usize stored in the symmetric difference of self and other. See symmetric_difference_with for an efficient in-place version.

Examples

use bit_set::BitSet;

let a = BitSet::from_bytes(&[0b01101000]);
let b = BitSet::from_bytes(&[0b10100000]);

// Print 0, 1, 4 in arbitrary order
for x in a.symmetric_difference(&b) {
    println!("{}", x);
}

fn union_with(&mut self, other: &Self)

Unions in-place with the specified other bit vector.

Examples

use bit_set::BitSet;

let a   = 0b01101000;
let b   = 0b10100000;
let res = 0b11101000;

let mut a = BitSet::from_bytes(&[a]);
let b = BitSet::from_bytes(&[b]);
let res = BitSet::from_bytes(&[res]);

a.union_with(&b);
assert_eq!(a, res);

fn intersect_with(&mut self, other: &Self)

Intersects in-place with the specified other bit vector.

Examples

use bit_set::BitSet;

let a   = 0b01101000;
let b   = 0b10100000;
let res = 0b00100000;

let mut a = BitSet::from_bytes(&[a]);
let b = BitSet::from_bytes(&[b]);
let res = BitSet::from_bytes(&[res]);

a.intersect_with(&b);
assert_eq!(a, res);

fn difference_with(&mut self, other: &Self)

Makes this bit vector the difference with the specified other bit vector in-place.

Examples

use bit_set::BitSet;

let a   = 0b01101000;
let b   = 0b10100000;
let a_b = 0b01001000; // a - b
let b_a = 0b10000000; // b - a

let mut bva = BitSet::from_bytes(&[a]);
let bvb = BitSet::from_bytes(&[b]);
let bva_b = BitSet::from_bytes(&[a_b]);
let bvb_a = BitSet::from_bytes(&[b_a]);

bva.difference_with(&bvb);
assert_eq!(bva, bva_b);

let bva = BitSet::from_bytes(&[a]);
let mut bvb = BitSet::from_bytes(&[b]);

bvb.difference_with(&bva);
assert_eq!(bvb, bvb_a);

fn symmetric_difference_with(&mut self, other: &Self)

Makes this bit vector the symmetric difference with the specified other bit vector in-place.

Examples

use bit_set::BitSet;

let a   = 0b01101000;
let b   = 0b10100000;
let res = 0b11001000;

let mut a = BitSet::from_bytes(&[a]);
let b = BitSet::from_bytes(&[b]);
let res = BitSet::from_bytes(&[res]);

a.symmetric_difference_with(&b);
assert_eq!(a, res);

fn len(&self) -> usize

Returns the number of set bits in this set.

fn is_empty(&self) -> bool

Returns whether there are no bits set in this set

fn clear(&mut self)

Clears all bits in this set

fn contains(&self, value: usize) -> bool

Returns true if this set contains the specified integer.

fn is_disjoint(&self, other: &Self) -> bool

Returns true if the set has no elements in common with other. This is equivalent to checking for an empty intersection.

fn is_subset(&self, other: &Self) -> bool

Returns true if the set is a subset of another.

fn is_superset(&self, other: &Self) -> bool

Returns true if the set is a superset of another.

fn insert(&mut self, value: usize) -> bool

Adds a value to the set. Returns true if the value was not already present in the set.

fn remove(&mut self, value: usize) -> bool

Removes a value from the set. Returns true if the value was present in the set.

Trait Implementations

impl<B: BitBlock> Clone for BitSet<B>

fn clone(&self) -> Self

fn clone_from(&mut self, other: &Self)

impl<B: BitBlock> Default for BitSet<B>

fn default() -> Self

impl<B: BitBlock> FromIterator<usize> for BitSet<B>

fn from_iter<I: IntoIterator<Item=usize>>(iter: I) -> Self

impl<B: BitBlock> Extend<usize> for BitSet<B>

fn extend<I: IntoIterator<Item=usize>>(&mut self, iter: I)

impl<B: BitBlock> PartialOrd for BitSet<B>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

fn lt(&self, other: &Rhs) -> bool

fn le(&self, other: &Rhs) -> bool

fn gt(&self, other: &Rhs) -> bool

fn ge(&self, other: &Rhs) -> bool

impl<B: BitBlock> Ord for BitSet<B>

fn cmp(&self, other: &Self) -> Ordering

impl<B: BitBlock> PartialEq for BitSet<B>

fn eq(&self, other: &Self) -> bool

fn ne(&self, other: &Rhs) -> bool

impl<B: BitBlock> Eq for BitSet<B>

impl<B: BitBlock> Debug for BitSet<B>

fn fmt(&self, fmt: &mut Formatter) -> Result

impl<B: BitBlock> Hash for BitSet<B>

fn hash<H: Hasher>(&self, state: &mut H)

fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher

impl<'a, B: BitBlock> IntoIterator for &'a BitSet<B>

type Item = usize

type IntoIter = Iter<'a, B>

fn into_iter(self) -> Iter<'a, B>